A269722 Triangle read by rows: coefficients of polynomials arising as traces of certain web-coloring matrices.
1, 2, 2, 6, 8, 6, 24, 30, 42, 24, 120, 116, 216, 264, 120, 720, 532, 1002, 1920, 1920, 720, 5040, 2848, 4626, 11688, 19200, 15840, 5040
Offset: 1
Examples
Triangle begins:
1
2 2
6 8 6
24 30 42 24
120 116 216 264 120
720 532 1002 1920 1920 720
5040 2848 4626 11688 19200 15840 5040
...
Links
- Mark Dukes, Chris D. White, Web Matrices: Structural Properties and Generating Combinatorial Identities, arXiv:1603.01589 [math.CO], 2016. See Fig. 7 p. 19.
- Mark Dukes, Chris D. White, Web Matrices: Structural Properties and Generating Combinatorial Identities, Electronic Journal Of Combinatorics, 23(1) (2016), #P1.45.